Treatment of cacao butter



Patented May 14, 1940 UNITED STATES PATENT OFFICE Morse, and Robert IanJohnson, London, England, assignors to Crosse & Blackwell Limited,London, England, a. British company No Drawing. Original applicationJanuary 15,

1937, Serial No. 120,822.

Divided and this application September 25, 1937, Serial No. 165,770. InGreat Britain January 18, 1936 6 Claims.

This invention relates to methods of preparing modified glyceridessuitable for use in the process of U. S. application No. 120,822, nowPatent No. 2,103,612, from which this application is divided,

or in the process of U. S. application No. 120,823,

now Patent No. 2,097,720.

According to the invention, a suitable glyceride,

containing initially a major proportion of a mono-unsaturateddisaturated glyceride such as oleodistearin or oleopalmitostearin, isoxidised preferably by blowing with an oxidising gas.

The preferred raw material is cacao butter which is oxidised andpreferably polymerised, but similar raw materials may be used such aspremier jus.

Example 1 448 lbs. of cacao butter are placed in a gas fired stainlesssteel pan, fitted with a thermostat and a stainless steel coil forblowing in air.

' The temperature is raised to 250 0. and air is M difi d iModigedBModified o e g yceri e l cende AB (oxidisedand Property g Q% Eoiidisedand substantially on polymerised) completely polymerised) Molecularweight 1050-1150 1250-1350 Above 1500 Iodine value 23-24 20-22 20-22Time ofreaction, hours..- 4-5 7-8 Over 9 The point at which the reactionis stopped will depend on the desired properties of the product, and thevalues given above refer only to one range of products under certainconditions (type of pan,

volume of air, temperature, catalysts, etc.) and where products ofslightly different properties are required, the reaction may be stoppedwhen the molecular weight has attained values outside those limits givenabove.

Where a preponderance of modified glyceride 5 A is required in themodified glyceride AB, it is desirable to carry out the reaction in analuminium pan and in the absence of catalysts, such as iron. If amodified glyceride B is required, a suitable iron salt (iron oleate) maybe added to 10 give an iron concentration of to parts per million andthe presence of this amount of iron may reduce the reaction time byhalf.

The oxidation may be carried out by any other suitable method (e. g.acetic acid/hydrogen per- 15 oxide mixtures), the modified glyceride Athus formed being subsequently taken to any desired degree ofpolymerisation to give the AB or B forms. The polymerisation of theoxidised prodnot (A or AB) may be performed by heating in 5Q absence ofair, with or without agitation.

We declare that what we claim is: l. Polymerised and strongly oxidisedcacao butter having a molecular weight from 1050 to 1500 and an iodinevalue below 24. 25

2. Strongly oxidised cacao butter having a molecular weight of about1050 to 1150 and an I iodine value of about 23 to 24.

crease polymerisation. 40

WILLIAM CLAYTON. SYDNEY BACK. JAMES FREDERICK MoRsE. ROBERT IAN JOHNSON.45

